<!DOCTYPE html>
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
  <title>百度地图离线API V2.1  www.xiaoguo123.com</title>
	<style type="text/css">
  body, html,#map_demo, #tab, #mapfrm {width: 100%;height: 100%;overflow: hidden;margin:0;font-family:"微软雅黑";}
  #menu{height:100%;overflow-y:auto}
  td{font-size:14px}
  h4{margin:0;}
  #map_demo1,#map_demo2{height: 50%}
  </style>
  <script type="text/javascript" src="../../offlinemap/map_load.js"></script>
  <link rel="stylesheet" type="text/css" href="../../offlinemap/css/map.css"/>
  
  <script type="text/javascript" src="../jquery.js"></script>
  <script type="text/javascript" src="../layer/layer.js"></script>
</head>
<body>
<div id="map_demo">1</div>
</body>
</html>
<script type="text/javascript">  
	// 百度地图API功能
	var map = new BMap.Map("map_demo");
	var point = new BMap.Point(116.900244,39.92556);
	map.centerAndZoom(point, 8);
	map.enableScrollWheelZoom();                        //启用滚轮放大缩小
  
	//centre:椭圆中心点,X:横向经度,Y:纵向纬度
	function add_oval(centre,x,y)
	{
		var assemble=new Array();
		var angle;
		var dot;
		var tangent=x/y;
		for(i=0;i<36;i++)
		{
			angle = (2* Math.PI / 36) * i;
			dot = new BMap.Point(centre.lng+Math.sin(angle)*y*tangent, centre.lat+Math.cos(angle)*y);
			assemble.push(dot);
		}
		return assemble;
	}
	var oval = new BMap.Polygon(add_oval(point,0.6,1.3), {strokeColor:"blue", strokeWeight:6, strokeOpacity:0.5});
	map.addOverlay(oval);

</script>